JPH049634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a welding device for the bodies of motorcycles and other vehicles.

(Prior Art) Conventionally, according to Japanese Patent Application Laid-Open No. 58-132397, a vehicle is equipped with a temporary attachment station and an additional stroke station in front of the temporary attachment station, and vehicle body components set on a set trolley are arranged on both sides of the temporary attachment station. A car body welding device is known in which tack welding is performed by a welding robot, and the tack welded car body is delivered to a hanger truck and delivered to the additional hammer station.In this case, one set truck is transferred to the tack station. If the structure is such that the parts are loaded into the tacking station from the rear set position, after the tack welding of the car body components on the set truck is completed at the tack station, the truck is moved back to the set position and then the next step is carried out. The vehicle body components have to be set on the trolley, and there is a problem in that productivity is reduced due to lost time due to the setting work.

Therefore, in the method described in the above-mentioned Japanese Patent Application Laid-Open No. 58-132397, two setting carts are provided, and an index table is further provided at the setting position, so that during temporary welding of the car body components on one of the setting carts, The next vehicle body component can be set on the other set trolley.

(Problems to be Solved by the Invention) In the above conventional technology, after the tack welding is completed, one of the setting carts is moved back from the tack welding station onto the index table at the setting position, and then the table is rotated for indexing. Then, it is necessary to load the other set trolley from the table into the tacking station, and it takes a relatively long time from the end of tack welding until the next set trolley is loaded into the tack station, which slows down production. There is a problem in which there is little hope for improvement in sexual performance.

An object of the present invention is to provide a device that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention is provided with a temporary attachment station and an additional strike station in front of the temporary attachment station, and is capable of attaching a plurality of vehicle body components set on a setting truck to the temporary attachment station. In a car body welding device in which tack welding is performed by welding robots placed on both sides of a station, the tack welded car body is delivered to a hanger truck, and delivered to the additional welding station. arranged in a hanging manner,
Two setting carts are provided, and each of the setting carts can be input into the tacking station alternately from one side and the other side in the lateral direction through the space below each welding robot, and one of the setting carts is The present invention is characterized in that the other setting cart is moved back to each predetermined setting position when the setting truck is put into the temporary mounting station.

(Function) Each setting cart is alternately introduced into the temporary fixing station through the space below each welding robot, and when one setting cart is introduced, the other setting cart is moved back to each setting position. , is obtained by performing the setting work on the other setting trolley during temporary welding of the car body constituent members on one setting trolley, and
When one setting cart returns to the setting position after tack welding, the other setting cart can be loaded into the tack station at the same time. Compared to a system in which the setting cart is moved back from the station at the beginning of the welding process, the table is index-rotated and the next set cart is introduced into the station. The time until the trolley is introduced is shortened.

(Embodiment) The illustrated embodiment is a welding device for welding a plurality of vehicle body structural members C as shown in FIG. 10 that constitute a rear frame B of a motorcycle body A as shown in FIG. 9. 1 is the temporary attachment station, 2
₁ , 2 ₂ are the first and second sections in front of the temporary attachment station 1.
An additional stroke station, 3 is a payout station in front of it, and 4 is a set truck, and the vehicle body component C is positioned and held on the set truck 4 by each clamper 4a provided thereon, as shown in FIG. Tack welding is performed by four welding robots 5 placed on both sides of the tack welding station 1. Additionally, rails 6, 6 are installed above the line from the tacking station 1 to the dispensing station 3.
are provided, and three first to third units are installed on the rails 6, 6.
The hanger carts 7 ₁ , 7 ₂ , 7 ₃ are hung so as to be movable back and forth, and the rear frame B made of the above-mentioned member C which is tack welded by the first hanger cart 7 ₁ is moved from the tack welding station 1 to the first additional stroke station. 2 ₁ and delivered to the two sets of jig units 8 and 9 provided in the first additional welding station 2 ₁ , and the two welding robots 10 and 10 disposed on both sides of the first additional welding station 2 ₁ . Then, the rear frame B is subjected to additional welding, and then the first additional welding station 2
The rear frame B is transported from ₁ to the second multi-stroke station ₂₂ by the second hanger trolley ₇₂ , and prepared in the second multi-stroke station ₂₂ as described above.
The two welding robots 11, 11 placed on both sides of the second welding station ₂₂ perform the remaining additional welding on the rear frame B, and then the second The rear frame B, which has been welded in additional strokes, is delivered from the additional stroke station ₂₂ to the delivery station ₃ by the third hanger cart 73.

Here, each of the welding robots 5 of the tacking station 1 is arranged in a hanging manner as shown in FIG. , a rotating frame 12 having a dogleg shape in plan view and having two arms 12a, 12a long enough to reach the station 1 at an angle of 120°.
is mounted on a base 13 fixed to the floor via a bearing 14 at the middle part thereof, and a pair of front and rear positioning pins 15, 15 are provided on each arm 12a and are provided on each of the arms 12a. With a pair of four clampers 16, the set cart 4 can be freely positioned and held as shown in FIG. Then, by the rotating movement of the rotating frame 12, each set carriage is passed from the set positions 18 ₁ and 18 ₂ on one side and the other side in the rear lateral direction to the temporary attachment station 1 through the space below each welding robot 5. 4 can be thrown in alternately, and when one setting cart 4 is put into the station 1, the other setting cart 4 can be moved back to the respective setting positions 18 ₁ and 18 ₂ .

Further, as shown in FIG. 3, each set position 18 ₁ ,
Turntables ₂₀ , 20 on which another set cart 4 is mounted are provided on the side of 182, and each set cart 4 of the rotating frame 12 is delivered onto each turn table 20, and it is reversed and placed on the table. The setting cart 4 is made replaceable by allowing another setting cart 4 on the top 20 to be thrown into the revolving frame 12.

In this case, as shown in FIG.
A retractable slide bearing 21 is provided on the upper surface so that the setting cart 4 can roll on each arm 12a when replacing the setting cart 4, thereby facilitating the replacement work of the setting cart 4. .
In addition, in the illustration, the two sets of jig units 8,
As shown in FIGS. 6 and 7, the front jig unit 8 is a top and bottom jig unit 8 that clamps the peripheral edge of the fitting hole b of the main pipe D of the rear frame B.
At least two having a pair of clamp claws 8a, 8a
A pair of clamp members 8 ₁ and 8 ₂ corresponding to the type of rear frame B are provided, and these clamp members 8 ₁ ,
8 ₂ is given a 90° reversal motion by actuation of a cylinder 8d using a shaft 8c horizontally installed on a stay 8b as a fulcrum, and the jig unit 9 on the rear side is clearly shown in FIGS. 6 and 8. Like, rear frame B
A pair of clamp members 9 1 corresponding to at least two types of rear frames B, each having a pair of left and right clamp claws 9a, _9a for clamping the rear part of the rear frame B from both sides.
9 ₂ , the clamp members 9 ₁ and 9 ₂ are given a 90° turning motion by the operation of a cylinder 9d about a shaft 9c provided upright on the stay 9b, and each of the first to third Hanger trolley 7
₁ , 7 ₂ , _{7 3} are provided with a pair of clamp members _{19 1} , _{19 2 corresponding} to _at least two types of rear frames B. _These clamp members 8 ₁ , 8 ₂ , 9 ₁ , 9 ₂ ,
19 ₁ and 19 ₂ can be switched freely.

In the drawing, 8e is a push rod that opens and closes both clamp claws 8a, 8a of each clamp member 8 ₁ , 8 ₂ of the front jig unit 8, and 9e is a push rod for each clamp member 9 ₁ , 9 ₂ of the rear jig unit 9. Each clamp claw 9a
The cylinder 19c opens and closes each clamp member 19 ₁ of the first to third hanger carts 7 ₁ , 7 ₂ , 7 ₃ .
₁₉ shows a cylinder that opens and closes each clamp claw 19e.

Next, to explain the operation of the embodiment, first, one of the two set carts 4, 4 set on each arm 12a of the rotating frame 12, for example, the X shown in FIG.
One set position 18 ₁ is placed on the set trolley 4 shown by
By setting the plurality of vehicle body structural members C at , and then turning the rotating frame 12 120 degrees clockwise from the state shown by the solid line to the state shown by the chain line in the same figure, the setting cart 4 is moved to the lower side of the welding robot 5. At the same time, the other set trolley 4 shown as Y in the figure passes through the space below the welding robot 5 from the tack station 1 to the other set position ₁₈₂ . Returned. Then,
Each of the welding robots 5 performs tack welding on these members C fed into the tack station 1, and
The next vehicle body component C is set on the Y setting trolley 4 which has been moved back to the other setting position ₁₈₂ .

Next, after tack welding, the rear frame B is
After being delivered to the hanger truck ₇₁ , by rotating the rotating frame 12 120 degrees counterclockwise, the Y setting truck 4 passes through the space below the welding robot 5 and is thrown into the temporary attachment station 1. _,
It will be returned to Japan.

It is also possible to provide setting positions on one side and the other side in the lateral direction of the temporary attachment station 1 so that each setting trolley 4 can be reciprocated in the lateral direction. If the setting cart 4 is configured to reciprocate between the tacking station 1 and the laterally adjacent setting positions 18 ₁ and 18 ₂ behind it, the distance between the setting positions 18 ₁ and 18 ₂ can be reduced. The operator is placed at each set position 18 ₁ ,
It is possible to carry out the setting work on each set trolley 4 without having to arrange the sets at ₁₈₂ , which is advantageous in that productivity can be improved.

Also, each of the first to third hanger carts 7 ₁ , 7 ₂ , 7
At least two types of clamp members 19 ₁ , 19 ₂ of No. ₃ and each clamp member 8 ₁ , 8 ₂ , 9 ₁ , 9 ₂ of each jig unit 8 , _{9 of the first and second additional stroke stations 2 1} , 2 ₂ are used. These clamp members 8 ₁ , 8 are provided.
By configuring ₂ , 9 ₁ , 9 ₂ , 19 ₁ , 19 ₂ to be switchable, it is advantageous to be able to easily accommodate different types of rear frames B by simply replacing each set trolley 4. It is also possible to set separate set carts 4, 4 corresponding to different vehicle body structural members C on the revolving frame 12, and to alternately weld the two types of rear frames B.

(Effects of the Invention) As described above, according to the present invention, during tack welding of a car body constituent member on one setting trolley, the next car body constituent member can be set on the other setting trolley, and This also has the effect of shortening the time from the end of tack welding until the next set cart is introduced into the tack welding station, thereby improving productivity.

[Brief explanation of drawings]

Fig. 1 is a side view of one example of the device of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a plan view thereof, and Fig. 4 is a third
FIG. 5 is a rear view taken along the line - in FIG. 4, FIG. 6 is an enlarged side view of the jig unit, and FIG. 7 is a view taken along the line - in FIG.
FIG. 8 is a view taken along the - line in FIG. 6, FIG. 9 is a perspective view of an example of a two-wheeled motor vehicle body, and FIG. 10 is an exploded perspective view of a plurality of vehicle body components constituting the rear frame. . 1... Temporary mounting station, 2 ₁ , 2 ₂ ... 1st and 2nd additional hit station, 4, 4... Setting trolley, 5
... Welding robot, 7 ₁ , 7 ₂ , 7 ₃ ... First to third hanger carts, 18 ₁ , 18 ₂ ... Set position.

Claims (1)

[Claims] 1 Equipped with a tacking station and an additional hammering station in front of the tacking station, a plurality of car body component members set on a set trolley are tack welded by welding robots placed on both sides of the tacking station, and the tacking station is assembled into a car body that has already been tacked. In a car body welding device that is delivered to a hanger truck and delivered to the multi-stroke station,
Each of the welding robots is arranged in a suspended manner on the temporary attachment station, and two setting carts are provided, and each of the setting carts is inserted into the welding robot from one side and the other side in the lateral direction through the space below the welding robot. The vehicle body is characterized in that it is possible to alternately insert the parts into the temporary setting station, and when one setting cart is put into the temporary setting station, the other setting cart is moved back to each predetermined setting position. Welding equipment.